<template>
  <div class="clearfix">
    <a-upload
      action="https://www.mocky.io/v2/5cc8019d300000980a055e76"
      list-type="picture-card"
      v-model:file-list="fileList"
      @preview="handlePreview"
    >
      <div v-if="fileList.length < 8">
        <plus-outlined />
        <div class="ant-upload-text">Upload</div>
      </div>
    </a-upload>
    <a-modal :visible="previewVisible" :footer="null" @cancel="handleCancel">
      <img alt="example" style="width: 100%" :src="previewImage" />
    </a-modal>
  </div>
</template>
<script lang="ts">
import { PlusOutlined } from '@ant-design/icons-vue';
import { defineComponent, ref } from 'vue';

function getBase64(file: File) {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.readAsDataURL(file);
    reader.onload = () => resolve(reader.result);
    reader.onerror = error => reject(error);
  });
}

interface FileItem {
  uid: string;
  name?: string;
  status?: string;
  response?: string;
  percent?: number;
  url?: string;
  preview?: string;
  originFileObj?: any;
}

interface FileInfo {
  file: FileItem;
  fileList: FileItem[];
}

export default defineComponent({
  components: {
    PlusOutlined,
  },
  setup() {
    const previewVisible = ref<boolean>(false);
    const previewImage = ref<string | undefined>('');

    const fileList = ref<FileItem[]>([
      {
        uid: '-1',
        name: 'image.png',
        status: 'done',
        url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
      },
      {
        uid: '-2',
        name: 'image.png',
        status: 'done',
        url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
      },
      {
        uid: '-3',
        name: 'image.png',
        status: 'done',
        url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
      },
      {
        uid: '-4',
        name: 'image.png',
        status: 'done',
        url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
      },
      {
        uid: '-5',
        name: 'image.png',
        status: 'error',
      },
    ]);

    const handleCancel = () => {
      previewVisible.value = false;
    };
    const handlePreview = async (file: FileItem) => {
      if (!file.url && !file.preview) {
        file.preview = (await getBase64(file.originFileObj)) as string;
      }
      previewImage.value = file.url || file.preview;
      previewVisible.value = true;
    };
    const handleChange = ({ fileList: newFileList }: FileInfo) => {
      fileList.value = newFileList;
    };

    return {
      previewVisible,
      previewImage,
      fileList,
      handleCancel,
      handlePreview,
      handleChange,
    };
  },
});
</script>
<style>
/* you can make up upload button and sample style by using stylesheets */
.ant-upload-select-picture-card i {
  font-size: 32px;
  color: #999;
}

.ant-upload-select-picture-card .ant-upload-text {
  margin-top: 8px;
  color: #666;
}
</style>
